Patents by Inventor Joseph Pleckaitis

Joseph Pleckaitis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thermoplastic polyurethanes prepared with small amounts of monohydric alcohols
    Patent number: 4098772
    Abstract: The processing temperatures of thermoplastic polyurethane elastomers are reduced, and the extrudability and the sensitivity to degradation by shear and by moisture are improved, by including a minute proportion (from 0.0005 to 0.05 equivalents, per equivalent of isocyanate) of a monohydric aliphatic alcohol in the reaction mixture (diisocyanate, polymeric diol and difunctional extender) employed to prepare thermoplastic polyurethane elastomers by the one-shot procedure.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: July 4, 1978
    Assignee: The Upjohn Company
    Inventors: Henry W. Bonk, Benjamin S. Ehrlich, Joseph Pleckaitis
  • Polyurethane elastomers based on alcohol-modified diisocyanate
    Patent number: 4080314
    Abstract: The processing temperatures of thermoplastic polyurethane elastomers are reduced, and the extrudability and sensitivity to shear and moisture are improved, by employing as the diisocyanate, in the preparation of said elastomers, the product obtained by reacting 4,4'-methylenebis(phenyl isocyanate) with a monohydric aliphatic alcohol. Use of the latter also counteracts batch-to-batch variations in reactivity of 4,4'-methylenebis(phenyl isocyanate).
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: March 21, 1978
    Assignee: The Upjohn Company
    Inventors: Henry W. Bonk, Benjamin S. Ehrlich, Joseph Pleckaitis